National Savings and Investments (NS&I), one of the UK’s largest savings institutions, is upgrading its core banking infrastructure by replacing legacy systems with SBS’s SBP Digital Core, a next-generation, cloud-native platform. The move is part of NS&I’s ongoing digital transformation programme in partnership with Atos, IBM, and Sopra Steria.
This significant infrastructure overhaul will enable NS&I to scale more efficiently, deliver faster services, and enhance the customer experience for its 24+ million retail clients. By moving away from traditional on-premise systems, NS&I is aligning with a broader trend among European retail banks to accelerate cloud investments. A recent Celent report projects that cloud spending in the sector will increase by 57.5% between 2025 and 2030, reaching $12.6 billion.
“NS&I’s transformation program will help deliver the digital experiences our customers expect while maintaining support for those who need it,” said Matt Smith, Chief Operating Officer at NS&I. “Replacing our core system is a critical milestone, and we’re excited to partner with SBS and Atos to make it happen.”
The SBS SBP Digital Core platform will serve as the new foundation for all NS&I retail banking and payment services. Hosted on Amazon Web Services (AWS), the system brings agility, scalability, and cost-efficiency. Unlike legacy or hybrid cloud models, SBS’s platform supports automatic updates, reducing downtime and ensuring continuous service enhancements without disrupting daily operations.
NS&I will now be able to adjust data storage and computing resources dynamically, significantly improving infrastructure efficiency. This shift enables the organisation to respond more swiftly to changes, such as savings rate updates or increased customer interactions.
“Cloud and SaaS transformation in banking is no longer about if—it’s about how,” said Eric Bierry, CEO of SBS. “NS&I is proving that large-scale digital banking transformation is achievable and vital for long-term innovation. We’re proud to support them on this journey.”
SBS’s SBP Digital Core is part of a broader suite of composable banking services used by over 1,500 financial institutions across Europe, the Middle East, and Africa. These include core banking, deposits, lending, payments, open banking, compliance reporting, and more—all designed to offer seamless, regulatory-compliant digital experiences.
By embracing a flexible, cloud-first infrastructure, NS&I is positioning itself at the forefront of modern banking, ready to meet future demands and deliver smarter, faster, and more personalised service to millions of customers.
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